Alistair Morrison Paul Tennent John Williamson Matthew Chalmers Using Location, Bearing and Motion Data to Filter Video and System Logs. 109-126 2007 conf/pervasive/2007 Pervasive http://dx.doi.org/10.1007/978-3-540-72037-9_7 db/conf/pervasive/pervasive2007.html#MorrisonTWC07